@prefix rdf: . @prefix owl: . _:vb280072 rdf:type owl:Class ; owl:unionOf _:vb280074 . @prefix pwdr: . _:vb280072 pwdr:describedby . @prefix bibo: . _:vb280073 rdf:first bibo:Document ; rdf:rest rdf:nil ; pwdr:describedby . _:vb280074 rdf:first bibo:Collection ; rdf:rest _:vb280073 ; pwdr:describedby .